US 9,882,418 B2Granted

Switching mode charger for charging system

AssigneeMediatek Inc.

InventorChih-Yuan Hsu

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Abstract

A switching mode charger capable of performing mode switching to adjust and output charging current for a battery or driving current for an external circuit element includes an input terminal, an output terminal, a Buck-Boost converter, and a controller. The Buck-Boost converter generates a voltage at the input terminal according to a voltage at the output terminal or generates a voltage at the output terminal according to a voltage at the input terminal. The controller dynamically selects an operation mode from a plurality of operation modes as an operation mode of the Buck-Boost converter according to at least one of the voltage change and the current change that are associated with the Buck-Boost converter, wherein the Buck-Boost converter dynamically performs mode switching according to the operation mode selected by the controller so as to adjust and output the charging current or the driving current.

Claims20

Dependent claims

A switching mode charger capable of performing mode switching to adjust and output a charging current for a battery or a driving current for an external circuit element in response to voltage change or current change, comprising:

an input terminal;
an output terminal;
a Buck-Boost converter, for generating a voltage at the input terminal according to a voltage at the output terminal or generating a voltage at the output terminal according to a voltage at the input terminal;
and
a controller, coupled to the Buck-Boost converter, the input terminal, and the output terminal, for dynamically selecting an operation mode from a plurality of operation modes as an operation mode of the Buck-Boost converter according to at least one of the voltage change and the current change that are associated with the Buck-Boost converter, wherein the Buck-Boost converter is arranged to dynamically performing mode switching according to the operation mode selected by the controller, so as to adjust and output the charging current or the driving current;
wherein the controller is arranged to, in response to a detected current of the Buck-Boost converter approaching a target current:
select a Buck-Boost mode from the plurality of operation modes as the operation mode of the Buck-Boost converter, and control the Buck-Boost converter to operate in the Buck-Boost mode, at least in part by:
calculating an average output current of the Buck-Boost converter, and
generating PWM signals to control four switching transistors of an H-Bridge structure of the Buck-Boost converter based on the average output current.

6 more elements

A method applied into a switching mode charger capable of performing mode switching to adjust and output a charging current for a battery or a driving current for an external circuit element in response to voltage change or current change, comprising:

using a Buck-Boost converter to generate a voltage at an input terminal according to a voltage at an output terminal or generate a voltage at the output terminal according to a voltage at the input terminal;
dynamically selecting an operation mode from a plurality of operation modes as an operation mode of the Buck-Boost converter according to at least one of the voltage change and the current change that are associated with the Buck-Boost converter;
and
dynamically performing mode switching according to the operation mode selected, so as to adjust and output the charging current or the driving current;
wherein in response to a detected current of the Buck-Boost converter approaching a target current the method further comprises:
selecting a Buck-Boost mode from the plurality of operation modes as the operation mode of the Buck-Boost converter,
calculating an average output current of the Buck-Boost converter, and
generating PWM signals to control four switching transistors of an H-Bridge structure of the Buck-Boost converter based on the average output current.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/443,654Filed 22 Apr 2014 · us provisional application
Priority: 22 Apr 2013
Published: US 2015/0280486 A11 Oct 2015
Granted: 30 Jan 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification21 codes

H02J 7/933
Regulation of charging or discharging current or voltage: the cycle being controlled or terminated in response to electric parameters
B60L 53/11
Characterised by the energy transfer between the charging station and the vehicle: dC charging controlled by the charging station, e.g. mode 4
B60L 53/14
Characterised by the energy transfer between the charging station and the vehicle: conductive energy transfer
B60L 53/16
Conductive energy transfer: connectors, e.g. plugs or sockets, specially adapted for charging electric vehicles

Family

Application61/814,601Us provisional application · filed 22 Apr 2013
US 2015/0280486 A1Pre-grant publication · published 1 Oct 2015
US 9,882,418 B2This patent

From the US filing history. Foreign family members aren’t listed.

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